Fe-C自生复合材料中石墨晶体取向的测定

Orientation of Graphite Flake in In-Situ Composites of Fe-C Eutectic Alloy

众所周知,石墨的晶体结构为六方,在基面(0001)上的原子以强键共价键结合,而两个基面间的原子结合力则为脆弱的Van der Waals力,因此,单晶石墨的力学性能是强各向异性的。在Fe-C自生复合材料中,几何形态上定向且平行排列的石墨片的强度与其晶体取向有关。本文采用单向凝固法,使石墨片的宏观形态沿纵向平行排列,即制成自生复合材料,然后,用扫描电镜和X射线衍射仪具体测定石墨片的晶体取向,为改善力学性能提供依据.

With the help of SEM and X-ray diffraction analysis, the orientation of graphite flakes in-situ composites of Fe-C cutectic alloy is measured. The results show that the (0001) plane of graphite is parallel to the longitudinal axis of specimen.